Source

Configuration

It is configured in the trac.ini file by enabling the component and configuring the path within the Subversion repository to store the wiki documents:

[components]
tracdocs.* = enabled
[docs]
root = wiki/trunk

By default, it will show the title of the directory that you are navigating, but if you create an index.txt file in the directory, it will use that instead, allowing you to put additional documentation at the top of a directory structure.